Bellwood, Peter S.
John Wiley & Sons, 2017
Buku Teks SO
edited by Eric Delson, Ian Tattersall, John A. Van Couvering and Alison S. Brokks
Garland Publishing, 2000
Buku Referensi
Stavrianos, Leften Stavros
Prentice-Hall, c1988
Buku Teks
Clark, W.A.V
Sage Publications, 1986
Buku Teks
McNeill, William H.
Prentice-Hall, 1990
Buku Referensi